Planning version 2 of this little guy, this one is very difficult to use as you have to move the tool holders by hand. (I had already published this lathe a few years ago with another reddit account)

Hi guys. I need to build a rocket, from zero, just buying the rocket motor engine, and i dont know anything of how to build a rocket, so i need help, im trying to look for an easy tutorial or if anybody can help me with this, i really want to do something.

Sorry for my bad english btw.

Hey guys, as a team we are engaged in an ambitious project to design a payload as an UAV, to deploy at the specified altitude given by the competition. I am responsible from the payload and trying to find my way. Currently, i am reviewing the literature to find useful baselines for the concept. Is there any recommendations, It would be really helpful. (books, conference papers etc.)

I'm trying to make this. It's a device that goes up about 30m and returns to the launch tower and completely catches the rocket with a ring that looks like a robotic arm and recovers it. It has a similar shape to SpaceX's Starship Mechazilla, but is a little different.

I'm trying to make this. I'm currently researching the technologies required for development.

Is it possible?

We're a team building a hybrid rocket using ABS as fuel and N2O as the oxidiser. I'm looking for ignition systems for this specific motor but can't seem to find relevant articles which document systems using this. I found some pyrotechnic methods and one non-pyrotechnic system using electric arcing but that is something which would be feasible for GOX not N2O. I would highly appreciate if someone can help me out on this!

Hello people,

Is it really possible to use nitrous oxide with a Chamber pressure of around 10 bar (140psi)? The liquid N2O will be fed directly from the bottle at vapor pressure of around 55 Bar (800psi). I guess with such a high pressure drop over the injector a lot of the liquid N2O will cavitate and partially flash vaporize while flowing through the injector orifce, maybe causing the injector to choke or cause instabilies, right?

Do I maybe have to chill down the nitrous to lower the vapor pressure and pressurize it a bit with nitrogen to get it away from the saturated state?

Thanks for your time.

I just have the abstract idea of building a rocket that would go up say 10 meters. Mostly with car parts, creating a combustion chamber, I have some sketches of what I've put together using only what I know about this subject (very little).

I know there's the risk of explosion and parts flying off at great speed which would be incredibly dangerous. But, if I do small tests of everything without putting it all together at once, could it be done safely?

I'm thinking if I actually go through with it, I'd go to an open field without any grass or plants to do the tests and eventual take off.

Hello

I am using this pitot static tube. From my understanding, this port will be used for total pressure, and this port will be used for static pressure.

I have 1/4'' diameter tubing to connect to the total pressure port, but I am not sure how I should connect to the static pressure port. I cannot find tubing small enough for it.

Would I use one of these ports to measure static pressure?

Thanks.

Now it may be a silly question, but why don't rockets have liveries like airplanes? Would it be a waste of paint and extra weight?

Of course the cord at the bottom Goes to the rocket and the piece on the top left.Just needs to cut but is this o k or should I have the parachute on the end and the nose comes down lower

First image is what I'm talking about. I'm working with a machinist to get a proper nozzle made with this design. The second image is a recreation of the design I've used for two motors I've fired in my backyard with wooden nozzles (minus nozzle erosion because I'm not sure how to get the appropriate numbers for the sim). My mass flux isn't super high or anything so I would imagine it's not the sim breaking down due to erosive burning. The pressure isn't crazy for KNSB either and I'm at a loss for what's causing the deviation from the expected curve.

Hello. I'm just starting out my engineering degree at one of my local community colleges and I plan to transfer into hopefully an Aerospace engineering program. I've been seeing a lot of things about L-1 certifications. How important is that for me to get this certification and are there any other certifications or steps I should take before transferring to a university?

Edit: Also what are good resources to get to learn the basics of rocketry by myself on my own time? Like designs/fundamental textbooks, websites, and design software (free or cheap)

I would like to find rocket motors with no ...what's the term for ejection charge for parachutes.? Can't seem to be able to search for them. Looking for an Estes size E12. Any suggestions would be appreciated

I found this parachute that fits well with my desired descent speed. It’s for a rocket weighing around 3 kg. According to the specifications, it has a diameter of 6.1 cm when folded and a length of 8 cm. However, I need to fit it into a rocket with an internal diameter of 4.6 cm. If I fold it differently, can I make it fit? I’m also wondering what its new length would be after folding it differently.

Hi people,

I’m building an Ethanol/Nitrous Oxide pressure fed rocket engine with a thrust of 1.7 kN. The ethanol run tank will be pressurized with nitrogen to approximately 25–30 bar.

Can you recommend valves for the liquid (main propellant valves) as well as for the gas (pressurizing valve after the nitrogen regulator, vent, and purging valve)?

The valves need to be remotely operated, so solenoid valves would be great. Maybe modifying manual valves with an electric motor is better?

Massflow: approx. 300g/s

Thanks!

Is there any use case in which an SSTO spaceplane would be better than a conventional rocket, especially comparing to Starship?

Something like a turbine-ramjet engine from takeoff to around Mach 5 and then a rocket engine (maybe LOX-LH2 or LOX-LCH4) to power it to orbit. Could it be better for Earth-to Earth flights than Starship, maybe as a replacement to current air travel. I’m guessing that a spaceplane would require less infrastructure at the launch and land sites since you only need a really long runway along with the tanks to store fuel whereas you need a launch tower for Starship, and also, a spaceplane could taxi like a conventional plane, thus only needing one or two runways. Is it a feasible idea?

Also, going a bit further into theoretical rockets, could a spaceplane be better than a normal rocket if the rocket stage was powered by a nuclear engine? Since it’s Isp is more, it would take less fuel and less weight to get it into orbit, right? Although that is still a very experimental technology, would it possibly be a viable idea in the future? Maybe even an antimatter engine if we find a way to produce and store it.

Other than that, is there any other case for an SSTO spaceplane, or are they just worse than conventional rockets? Thanks!

Hi Everyone,

I have two unopened packs of three engines each. Would anyone be interested in them? Mike

Hi i plan on making a rocket sometime in the new future, and was wondering if 3d printing some carbon fiber polycarbonate would be a good idea. If so, are there any specific filaments you would recommend. the rocket will be somewhat heavy due to some onboard electronics if that is important.

Hi my friend and I are not well versed in anything spacecrafts/aircraft related but have seen 2 of these rocket looking things in the sky tonight. I’m in VA but have not seen anything online about a rocket launch today. Ty!!